direct screw fixings pt ® type - RGA and PSM Fasteners

FOR PLASTICS & LIGHT ALLOYS
DIRECT SCREW FIXINGS
FASTENERS FOR PLASTICS
INTERNATIONAL
P.S.M INTERNATIONAL

INTERNATIONAL
P.S.M the local
INTERNATIONAL
fastener company . . .
PSM International is a global manufacturer and distributor of
specialised fasteners and joining systems.
INTRODUCTION
The Company has its origins in the heartland of British manufacturing
- the so called “Black Country” in the English Midlands.
The business was established in 1931 to supply special high precision,
machine turned components for the lock industry for which the area is
still famous.
The development of the Company’s present product range began in
1951 and by the 1960’s the business was almost entirely devoted to the
manufacture and distribution of specialist fastener products.
Today PSM is focused solely on providing design engineers and
manufacturers with engineered solutions to assembly problems which
provide cost effective methods and enhance the performance of the
finished item. PSM engineers are trained to high standards to assist
design engineers in this specialised area. PSM manufacture over 100
different products in 10,000 variations.
The Company is a member of the McKechnie Group PLC and has
global capabilities with manufacturing and distribution operations in
25 countries around the world.
Wherever manufactured goods are made PSM has local people
providing technical support, application engineering, project
management and customer service to a consistently high standard.
. . . Worldwide

INTRODUCTION
Direct Screw Fixings provide a fast, economical,
production line solution to fixing plastic and light alloy
components where the need for re-use and high assembly
torque is not a major factor.
The unique patented thread forms of the PT ® Screw range
have been engineered to maximise the advantages of
Direct Screw Fixings with forming screws for
thermoplastics and light alloy materials and cutting types
for use with thermosetting materials.
PT ®
SERIES
The adoption of these thread forms ensures that the
margins between installation and stripping torque are
optimised (an essential for trouble free installation)
together with higher than normal re-usability - typically
greater than 10 times - into thermoplastic materials, and
maximum resistance to vibration.
The information in this catalogue is intended as a general
guide. For further advice please consult your local PSM
Sales Engineer or our Applications Engineers. The PSM
Technology Centre can also provide pre-production test
facilities for accurate performance data.
PT ® SERIES - Designed for use in thermoplastics, its key design features include a profiled thread root to
assist plastic flow, a 30° flank angle to reduce boss bursting forces and an 8° pitch angle.
DURO-PT ®
SERIES
pages 4-7
pages 8-10
DURO-PT ® SERIES - The cutting notch combined with the profiled thread root gives low installation torques
whilst the special thread form provides high stripping torques when used in thermosetting materials.
DIRECT SCREW FIXINGS
PT ®
TYPE DG
pages 11-13
PT ® TYPE DG - Developed to provide an effective screw fixing in light alloy materials with low installation torque
and high stripping torque.
Technical details may change. Please contact PSM International for latest drawings and specifications.
3
INTERNATIONAL

The PT ® SCREW is a direct screw fastener for use in thermoplastics.
The key design aspects include a profiled thread root to assist plastic flow, a 30°
flank angle to reduce boss bursting forces and an 8° pitch angle which combine to
give low installation torques with high stripping torques. For those applications not
requiring the high levels of thread re-use and high clamping torque, (properties
associated with threaded inserts) PT ® screw offers an economical solution to
plastics assembly and has distinct advantages over other direct screw fixings.
DIRECT SCREW FIXINGS PT ® TYPE
PT is a registered trade mark of
EJOT Verbindungstechnik GmbH &
Co. KG, Bad Laasphe, Germany
Hole
Diameter
(Measured at
mid-point of
screw
penetration
depth)
DESIGN GUIDE
Recommended Boss Design
Boss Diameter
d+0.2mm
ADVANTAGES
REDUCED INSTALLATION TORQUE.
HIGH STRIPPING TORQUE.
GREATER SAFETY MARGIN BETWEEN INSTALLATION TORQUE AND STRIPPING TORQUE.
HIGH PARENT MATERIAL SHEAR STRENGTH.
MINIMISES MATERIAL FLOW RESISTANCE.
DESIGNED TO REDUCE STRESS WITHIN THE THERMOPLASTIC TO AN
ABSOLUTE MINIMUM.
HIGH RESISTANCE TO VIBRATION AND RELAXATION.
ALLOWS FOR SMALLER BOSSES.
0.5d
Screw Penetration
Depth
When choosing a direct screw fixing one of the major criteria is to
obtain the maximum margin between driving torque and stripping
torque. Screw design, material characteristics, moulding practice,
hole size and installation speed all have an influence.
The specialised equipment necessary to measure the effect of
these factors is available at P.S.M's Technology Centre.
This allows customers to obtain the best design possible.
Pre-production testing is therefore strongly recommended.
Please note the inclusion of a counterbore - this is important for
the following reasons:
- Prevents damage to the top of the boss
- Helps alignment of the screw in the boss
- Assists in repeated assemblies of the screw
- Acts as a relief for any material extruded to the head of the
screw and allows flush finishes.
N.B. If moulded tool design or application into an existing boss
renders the recommended boss design impractical, please contact
P.S.M for specific advice.
d = Nominal External Thread Dia.
Hole Taper 1° inclusive
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4

DESIGN FEATURES
PT ® TYPE
8° OPTIMUM PITCH ANGLE
■ Lowest installation torque/highest stripping torque
■ Maximum resistance to vibration loosening and material
relaxation in the component
8°
PROFILED THREAD ROOT
■ Improved plastic flow reduces
stress, providing long term reliability
■ Greater surface area contact between
screw thread and plastic, to give a high
shear and stripping torque
■ Lower installation torques
30° COMBINED FLANK ANGLE
■ Lower radial stresses, reducing boss bursting force
■ Greater thread penetration into the plastic material,
permitting enhanced clamping torque
■ Reduced centre of pressure, producing lower installation
torque
DESIGN
RECOMMENDATION
MATERIAL
Min. Screw
Hole
Boss
Penetration
Diameter Diameter
Depth
ABS 0.8d 2d 2d
ABS/PC Blend 0.8d 2d 2d
ASA 0.78d 2d 2d
PA 4.6 0.73d 1.85d 1.8d
PA 4.6 - GF 30 0.78d 1.85d 1.8d
PA 6 0.75d 1.85d 1.7d
PA 6 - GF 30 0.8d 2d 1.9d
PA 6.6 0.75d 1.85d 1.7d
PA 6.6 - GF 30 0.82d 2d 1.8d
PBT 0.75d 1.85d 1.7d
PBT - GF 30 0.8d 1.8d 1.7d
PC 0.85d 2.5d 2.2d*
PC - GF 30 0.85d 2.2d 2.0d*
Flat Root thread v PT Profiled Root thread
Thread Root
Material flow restricted
60° Flank Angle v 30° Flank Angle
5
MATERIAL
60°
Hole
Diameter
Boss
Diameter
Helps
material flow
30°
Min. Screw
Penetration
Depth
LDPE 0.7d 2d 2d
HDPE 0.75d 1.8d 1.8d
PET 0.75d 1.85d 1.7d
PET - GF 30 0.8d 1.8d 1.7d
PMMA 0.85d 2d 2d
POM 0.75d 1.95d 2d
PP 0.7d 2d 2d
PP-TF 20 0.72d 2d 2d
PPO 0.85d 2.5d 2.2d*
PS 0.8d 2d 2d
PVC (Hard) 0.8d 2d 2d
SAN 0.77d 2d 1.9d
PPS
Contact PSM
For other materials contact PSM.
d = Nominal External Thread Diameter.
* Where materials are known to be sensitive to environmental stress cracking, ageing tests should be carried out as recommended by the material manufacturer.
Material flow
Hole
F Rad 1
Thread Root
R1
30° 15°
Resolution of Resultant Forces for the Same Volume Displacement
F Axi 1
F Axi 2
Area 1 Area 2
F Rad 1 = 0.500R F Rad 2 = 0.259R
F Axi 1 = 0.867R F Axi 2 = 0.966R Area 1 = Area 2
R2
F Rad 2
Material flow
Hole
DIRECT SCREW FIXINGS PT ® TYPE
INTERNATIONAL

PT ® TYPE DIMENSIONS
PRODUCT CODE
WN 14
HEAD STYLE 11 Pan Flange
F
L
H
L
H
P
HD
L
R
d
90°
HD
X
HD
Y
S
30°
HEAD STYLE 12 Pan.
HEAD STYLE 13 Countersunk
STANDARD RECESS STYLES
- Other available recesses are
shown on page 14.
MATERIAL
Through Hardened & Tempered Steel
STANDARD FINISHES
Zinc Plate and Clear Passivation (Z)
Zinc Plate and Chromate (ZC)
Zinc Plate and Black Chromate (ZBC)
OTHER FINISHES
– Available to order.
Nominal Diameter K18 K22 K25 K30 K35 K40 K50 K60 K70 K100
External thread d 1.8 2.2 2.5 3.0 3.5 4.0 5.0 6.0 7.0 10.0
Thread root R 1.04 1.25 1.40 1.66 1.91 2.17 2.68 3.19 3.70 5.23
Thread pitch P 0.80 0.98 1.12 1.34 1.57 1.79 2.24 2.69 3.14 4.49
Head diameter HD 4.4 5.0 6.0 7.0 8.0 10.0 12.0 14.0
Head height H 1.6 1.8 2.1 2.4 2.5 3.2 4.0 4.6
Flange thickness S 0.5 0.6 0.7 0.8 0.9 1.1 1.3 1.5
A PHILLIPS Recess No. 1 1 1 2 2 2 3 3
B POZI Recess No. 1 1 1 2 2 2 3 3
Head diameter HD 4.5 5.0 6.0 7.0 8.0 10.0 12.0 14.0 20.0
Head height H 1.4 1.5 2.1 2.4 2.6 3.3 3.6 4.2 5.5
Washer thickness S 0.5 0.5 0.6 0.7 0.8 1.0 1.2 1.4 2.0
C TORX ® Recess No. T6 T6 T10 T10 T20 T20 T25 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 6 IP 10 IP 10 IP 20 IP 20 IP 25 IP 30 IP 40 IP
Screw lengths > 3d X 1.8 2.2 2.5 3.0 3.5 4.0 5.0 6.0 7.0 10.0
Screw lengths ≤ 3d X 0.9 1.1 1.3 1.5 1.8 2.0 2.5 3.0 3.5 5.0
Head diameter HD 3.6 3.9 4.4 5.3 6.1 7.0 8.8 10.5 12.3
Head height H 1.5 1.5 1.7 2.0 2.5 2.7 3.4 4.0 4.5
A PHILLIPS Recess No. 0 1 1 1 2 2 2 3 3
B POZI Recess No. 0 1 1 1 2 2 2 3 3
Head diameter HD 3.6 4.0 4.2 5.6 6.9 7.5 8.2 10.8 12.5 16.0
Head height H 1.3 1.4 1.6 2.1 2.3 2.6 2.9 3.8 4.4 6.0
C TORX ® Recess No. T6 T6 T7 T10 T10 T20 T20 T25 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 6 IP 7 IP 10 IP 10 IP 20 IP 20 IP 25 IP 30 IP 40 IP
Screw lengths > 3d X 1.8 2.2 2.5 3.0 3.5 4.0 5.0 6.0 7.0 10.0
Screw lengths ≤ 3d X 0.9 1.1 1.3 1.5 1.8 2.0 2.5 3.0 3.5 5.0
Head diameter HD 3.4 3.8 4.7 5.5 7.3 8.4 9.3 11.3 13.6
Cylinder head height F 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60
Screw lengths > 3d Y 0.90 1.10 1.30 1.50 1.80 2.00 2.50 3.00 3.50
Screw lengths ≤ 3d Y 0.50 0.60 0.70 0.75 1.00 1.00 1.25 1.50 1.75
A PHILLIPS Recess No. 0 1 1 1 2 2 2 2 3
B POZI Recess No. 0 1 1 1 2 2 2 2 3
Head diameter HD 3.4 3.8 4.7 5.5 7.3 8.4 9.3 11.3 13.6
C TORX ® Recess No. T6 T6 T8 T8 T15 T20 T20 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 6 IP 8 IP 8 IP 15 IP 20 IP 20 IP 30 IP 40 IP
TORX PLUS ® ,TORX ® and AUTOSERT ® are registered trademarks of Camcar Division of Textron Inc.
HOW TO SPECIFY
SCREW TYPE WN1412-KB30 x10-Z
HEAD STYLE WN1412-KB30 x10-Z
RECESS CODE WN1412-KB30 x10-Z
THREAD DIAMETER WN1412-KB30 x10-Z
LENGTH OF SCREW WN1412-KB30 x10-Z
FINISH
WN1412-KB30 x10-Z
A PHILLIPS B POZI C TORX ® D TORX PLUS ®
PT SCREWS K 18
Length 'L' (mm)
Nominal Ø
(mm)
1.80
4 ± 0.6
5 ± 0.6
6 ± 0.6
7 ± 0.75
8 ± 0.75
10 ± 0.75
12 ± 0.9
14 ± 0.9
16 ± 0.9
18 ± 0.9
20 ± 1.05
25 ± 1.05
30 ± 1.05
35 ± 1.25
40 ± 1.25
50 ± 1.25
60 ± 1.5
70 ± 1.5
80 ± 1.5
90 ± 1.75
100 ± 1.75
K 22
2.20
SIZE RANGE
K 25
2.50
K 30
3.00
K 35
3.50
K 40
4.00
K 50
5.00
K 60
6.00
K 70
7.00
K 100
10.00
INTERNATIONAL
6

ASSEMBLY DATA
To determine the optimum performance of direct screw fixings there
are a number of influential factors which have to be considered if
problems on the production line or in service are to be avoided. In
order to establish the optimum clamping torque it is first necessary to
establish the following:
PT ® TYPE
1 2 3
1 Amount of torque required to form the first thread
2 The amount of torque required for the screwhead to come into
contact with the mating component.
3 The amount of torque required for the joint to fail.
These figures should be obtained by the use of specialised equipment
which simulates production line conditions since testing by hand
omits the important effect of friction due to installation speed.
P.S.M's Technology Centre is fully equipped to conduct these
tests for you.
The repeat torque accuracy of the installation tool can vary and
should always be considered when specifying the recommended
clamping torque.
The speed at which screws are installed should be carefully considered - speeds which are too high can
destroy the material into which the screws are being driven.
Although a speed of 600rpm is recommended for most materials, pre-production testing and consultation
with PSM should be undertaken for optimum results.
Ts
Torque
Ti
1
Stripping Torque
Installation Torque
Screw Penetration Depth
RECOMMENDED INSTALLATION TOOL SPEEDS
2
3
Joint Clamping
Screw head in
contact with material
Thread Friction
Thread Forming Torque
DIRECT SCREW FIXINGS PT ® TYPE
7
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DIRECT SCREW FIXINGS DURO-PT ® TYPE
PT is a registered trade mark of
EJOT Verbindungstechnik GmbH &
Co. KG, Bad Laasphe, Germany
The DURO-PT ® SCREW is a direct screw fastener for
use in thermosetting plastics.
The design incorporates many unique features which
provide designers with a really effective direct screw fixing
for these materials. The cutting notch combined with the
profiled thread root and special thread form provides low
installation and high stripping torques.
The efficient removal of cutting debris ensures greatly
reduced bursting forces, providing the solution to a common
problem associated with conventional self tapping screws,
when used in thermosets.
ADVANTAGES
REDUCES STRESS IN THERMOSETTING PLASTICS TO AN
ABSOLUTE MINIMUM.
WIDE SAFETY MARGIN BETWEEN INSTALLATION AND
STRIPPING TORQUE.
SUITABLE FOR ALL TYPES OF THERMOSETTING PLASTICS.
CAN BE USED IN THERMOPLASTICS WITH A HIGH FILL
CONTENT.(>30%)
INTERNATIONAL
8

DESIGN FEATURES
SPECIAL CUTTING NOTCH
DURO-PT ® TYPE
■ Removes 60-80% of material cut during the thread
cutting operation
■ Reduces installation torque
■ Reduces radial pressure
SPECIAL PROFILED ROOT
■ Provides space for debris
■ Reduces radial stress
■ Reduces installation torque
■ Increases stripping torque
SPECIAL SHAPED TOOTH
■ Reduces radial stress
■ Maximum surface bearing area
■ High stripping torque
■ High clamping force
■ High back-off torque
DESIGN GUIDE
BOSS DESIGN DEPENDS ON THE FOLLOWING FACTORS:
- Type of thermoset material used
- The density of the material
- The amount and type of filler
Because of these variables the following recommendations are
minimum and maximum guidelines only.
30°
Recommended Boss Design
Boss Diameter
d+0.2mm
0.5d
120°
DURO-PT ® SCREWS
HOLE DIAMETER
BOSS DIAMETER
SCREW
PENETRATION
DEPTH
Minimum
0.85 x d
2.5 x d
2.0 x d
Maximum
0.88 x d
3.0 x d
3.0 x d
FOR SPECIFIC APPLICATION ADVICE,
CONTACT P.S.M.
Hole
Diameter
(Measured at
the mid-point
of screw
penetration
depth)
Screw Penetration
Depth
0.5d
Chip Space
9
d = Nominal External Thread Dia.
Hole Taper 1° inclusive
INTERNATIONAL

PRODUCT CODE
WN 17
HEAD STYLE 42 Pan
H
P
X
L
HD
Nominal Diameter K22 K25 K30 K35 K40 K50 K60 K80
External thread d 2.2 2.5 3.0 3.5 4.0 5.0 6.0 8.0
Thread root R 1.59 1.81 2.18 2.56 2.93 3.68 4.42 5.91
Thread pitch P 0.71 0.77 0.86 0.95 1.04 1.23 1.42 1.79
Head diameter HD 4.0 5.0 6.0 7.0 8.0 10.0 12.0 16.0
Head height H 1.6 2.0 2.4 2.7 3.1 3.8 4.6 6.0
A PHILLIPS Recess No. 1 1 1 2 2 2 3 4
B POZI Recess No. 1 1 1 2 2 2 3 4
Head diameter HD 4.0 5.0 6.0 7.0 8.0 10.0 12.0 16.0
Head height H 1.6 2.0 2.4 2.7 3.1 3.8 4.6 6.0
C TORX ® Recess No. T6 T8 T10 T15 T20 T25 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 8 IP 10 P 15 IP 20 IP 25 IP 30 IP 40 IP
Screw lengths > 3d X 2.2 2.5 3.0 3.5 4.0 5.0 6.0 8.0
Screw lengths ≤ 3d X 1.1 1.3 1.5 1.8 2.0 2.5 3.0 4.0
R
d
DURO-PT ® TYPE DIMENSIONS
HEAD STYLE 43 Countersunk
F
Y
90°
HD
MATERIAL
Case Hardened Mild Steel
STANDARD FINISHES
Zinc Plate and Clear Passivation (Z)
Zinc Plate and Chromate (ZC)
Zinc Plate and Black Chromate (ZBC)
OTHER FINISHES
– Possible on quotation.
SCREW TYPE WN1742-KB30 x10-Z
HEAD STYLE WN1742-KB30 x10-Z
RECESS CODE WN1742-KB30 x10-Z
THREAD DIAMETER WN1742-KB30 x10-Z
LENGTH OF SCREW WN1742-KB30 x10-Z
FINISH
WN1742-KB30 x10-Z
L
Head diameter HD 3.8 4.7 5.6 6.5 7.5 9.2 11.0 14.5
Cylinder head height F 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.65
A PHILLIPS Recess No. 1 1 1 2 2 2 3 4
B POZI Recess No. 1 1 1 2 2 2 3 4
Head diameter HD 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8
Cylinder head height F 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.70
C TORX ® Recess No. T6 T8 T10 T15 T20 T25 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 8 IP 10 IP 15 IP 20 IP 25 IP 30 IP 40 IP
Screw lengths > 3d Y 1.10 1.30 1.50 1.80 2.00 2.50 3.00 4.0
Screw lengths ≤ 3d Y 0.60 0.70 0.75 1.00 1.00 1.25 1.50 2.0
TORX PLUS ® ,TORX ® and AUTOSERT ® are registered trademarks of Camcar Division of Textron Inc.
STANDARD RECESS STYLES
- Other available recesses are
shown on page 14.
HOW TO SPECIFY
A PHILLIPS B POZI C TORX ® D TORX PLUS ®
SIZE RANGE
DURO-PT SCREWS K 22
Length 'L' (mm)
Nominal Ø
(mm)
2.20
5 ± 0.6
6 ± 0.6
7 ± 0.75
8 ± 0.75
10 ± 0.75
12 ± 0.9
14 ± 0.9
16 ± 0.9
18 ± 0.9
20 ± 1.05
25 ± 1.05
30 ± 1.05
35 ± 1.25
40 ± 1.25
50 ± 1.25
60 ± 1.5
70 ± 1.5
80 ± 1.5
K 25
2.50
K 30
3.00
K 35
3.50
K 40
4.00
K 50
5.00
K 60
6.00
K 80
8.00
INTERNATIONAL
10

The PT ® TYPE DG is a direct screw fastener for use
in light alloys. The design incorporates many unique
features which provide designers with a really
effective direct screw fixing for these materials.
The profiled thread root gives low installation
torque whilst the special thread form provides high
stripping torque.
PT is a registered trade mark of
EJOT Verbindungstechnik GmbH &
Co. KG, Bad Laasphe, Germany
ADVANTAGES
THREAD FORMING - NO DEBRIS
RELIABLE & EASY INSTALLATION INTO PUNCHED, DRILLED,
EXTRUDED & MOULDED HOLES
RE-USABILITY OF SCREW
DIRECT SCREW FIXINGS PT ® TYPE DG
11
INTERNATIONAL

DESIGN FEATURES
SPECIAL PROFILED ROOT
PT ® TYPE DG
DIRECT SCREW FIXINGS PT ® TYPE DG
■ Reduces stress
■ Allows material to flow during thread forming
■ Reduces installation torque
■ Increases stripping torque
■ Increases pull-out load
SPECIAL SHAPED TOOTH
■ Reduces radial stress
■ Maximum surface bearing area
■ High stripping torque
■ High clamping force
■ High back-off torque
MINIMUM BOSS
DIAMETER
MINIMUM SCREW
PENETRATION
MAXIMUM SCREW
PENETRATION
DESIGN GUIDE
Hard
Materials
2.5 x d
1.5 x d
2.5 x d
Medium
Soft Materials
Soft
Materials
HOLE DIA. 0.94 x d 0.92 x d 0.90 x d
EXTRUDED HOLE
PUNCHED HOLE
Punching Direction
= Drive in Direction
2.5 x d
1.5 x d
2.5 x d
Hole Diameter
2.5 x d
1.5 x d
2.5 x d
Hole
Diameter
(Measured at
the mid-point of
screw
penetration
depth)
30°
Recommended Boss Design
Boss Diameter
d+0.2mm
120°
0.5d
Screw Penetration
Depth
d = Nominal External Thread Dia.
Hole Taper 1° inclusive
SOFT MATERIALS = ≤ 50 VPN
MEDIUM SOFT MATERIALS = 51 TO 75 VPN
HARD MATERIALS = 76 TO 100 VPN
INTERNATIONAL
Hole Diameter
12
FOR SPECIFIC APPLICATION ADVICE,
CONTACT P.S.M.

PRODUCT CODE
WN 15
F
HEAD STYLE 42 Pan
H
P
X
L
Y
HD
R
d
HEAD STYLE 43 Countersunk
90°
HD
STANDARD RECESS STYLES
- Other available recesses are
shown on page 14.
MATERIAL
Case Hardened Mild Steel
STANDARD FINISHES
Zinc Plate and Clear Passivation (Z)
Zinc Plate and Chromate (ZC)
Zinc Plate and Black Chromate (ZBC)
OTHER FINISHES
– Possible on quotation.
L
Nominal Diameter K22 K25 K30 K35 K40 K50 K60 K80
External thread d 2.2 2.5 3.0 3.5 4.0 5.0 6.0 8.0
Thread root R 1.59 1.81 2.18 2.56 2.93 3.68 4.42 5.91
Thread pitch P 0.71 0.77 0.86 0.95 1.04 1.23 1.42 1.79
Head diameter HD 4.0 5.0 6.0 7.0 8.0 10.0 12.0 16.0
Head height H 1.6 2.0 2.4 2.7 3.1 3.8 4.6 6.0
A PHILLIPS Recess No. 1 1 1 2 2 2 3 4
B POZI Recess No. 1 1 1 2 2 2 3 4
Head diameter HD 4.0 5.0 6.0 7.0 8.0 10.0 12.0 16.0
Head height H 1.6 2.0 2.4 2.7 3.1 3.8 4.6 6.0
C TORX ® Recess No. T6 T8 T10 T15 T20 T25 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 8 IP 10 IP 15 IP 20 IP 25 IP 30 IP 40 IP
Screw lengths > 3d X 2.2 2.5 3.0 3.5 4.0 5.0 6.0 8.0
Screw lengths ≤ 3d X 1.1 1.3 1.5 1.8 2.0 2.5 3.0 4.0
Head diameter HD 3.8 4.7 5.6 6.5 7.5 9.2 11.0 14.5
Cylinder head height F 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.65
A PHILLIPS Recess No. 1 1 1 2 2 2 3 4
B POZI Recess No. 1 1 1 2 2 2 3 4
Head diameter HD 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8
Cylinder head height F 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.70
C TORX ® Recess No. T6 T8 T10 T15 T20 T25 T30 T40
D TORX PLUS ® with AUTOSERT ® Recess No. 6 IP 8 IP 10 IP 15 IP 20 IP 25 IP 30 IP 40 I
Screw lengths > 3d Y 1.10 1.30 1.50 1.80 2.00 2.50 3.00 4.00
Screw lengths ≤ 3d Y 0.60 0.70 0.75 1.00 1.00 1.25 1.50 2.00
TORX PLUS ® ,TORX ® and AUTOSERT ® are registered trademarks of Camcar Division of Textron Inc.
HOW TO SPECIFY
SCREW TYPE WN1542-KB30 x10-Z
HEAD STYLE WN1542-KB30 x10-Z
RECESS CODE WN1542-KB30 x10-Z
THREAD DIAMETER WN1542-KB30 x10-Z
LENGTH OF SCREW WN1542-KB30 x10-Z
FINISH
WN1542-KB30 x10-Z
A PHILLIPS B POZI C TORX ® D TORX PLUS ®
SIZE RANGE
PT-DG SCREWS K 22
Length 'L' (mm)
Nominal Ø
(mm)
2.20
5 ± 0.6
6 ± 0.6
7 ± 0.75
8 ± 0.75
10 ± 0.75
12 ± 0.9
14 ± 0.9
16 ± 0.9
18 ± 0.9
20 ± 1.05
25 ± 1.05
30 ± 1.05
35 ± 1.25
40 ± 1.25
50 ± 1.25
60 ± 1.5
70 ± 1.5
80 ± 1.5
K 25
2.50
K 30
3.00
K 35
3.50
K 40
4.00
K 50
5.00
K 60
6.00
K 80
8.00
PT ® TYPE DG DIMENSIONS
13
INTERNATIONAL

OPTIONAL FEATURES
Ratchet
Head
Head with
hollow groove
Pilot
Point
Cone
Point
Dog
Point
OTHER AVAILABLE RECESSES
PH Combination
Recess (AL)
PZ Combination
Recess (BL)
Combination
TORX ® (CL)
Tamper Resistant
TORX PLUS ® (DR)
Tamper Proof
OPTIONAL FEATURES
SPECIAL VARIATIONS
Slotted
Cheese Head
Slotted
Pan Head
Slotted
Countersunk
Double
Ended Stud
Slotted
Shoulder Screw
Hex
Head
Hex
Flange
Captive Claw
Washer
INTERNATIONAL
14

INSERTS FOR PLASTICS
THREADED FASTENERS FOR
THIN SHEET METAL
Both riveting and self-clinching types
are available in a variety of styles
including stand-offs, blind types, self
locking and self piercing.
Whether the design calls for high
performance or compact size there is a
product specially designed to match
the requirement.
SPRING STEEL AND
PLASTIC FASTENERS
PSM offers the widest selection of inserts
for plastics available anywhere. There is
a PSM insert to suit every plastic and
every installation technique. Press-Lok ®
and Fin-Lok ® offer the simplicity of
push-in installation. Miniature designs
are made possible by Mini-Tech ® .
There is the high performance of
Tech-Sonic ® and the ultrasonic capability
of Sonic-Lok ® . Screw-Sert ® is ideal for
low strength materials whilst for
thermosetting resins
Banc-Lok ® and Spiro ® are recommended.
FASTENERS FOR METAL
The versatility of the spring steel
fastener is unique and gives designers
of complex parts the flexibility
they need.
PSM manufactures specially designed
items to meet specific design criteria,
although standard parts are
also available.
Complementing these parts is a
range of corrosion resistant and
lightweight plastic moulded
fixings and components.
THREAD LOCKING AND
SEALING SYSTEMS
OTHER PSM PRODUCTS
PSM’s engineering pin range includes
‘Hardened and Ground’ pins in parallel
and tapered format together with
Grooved pins.
Hardened steel Screw-Sert ® and PHI ®
provide machine threads for cast alloys
whilst PTDG ® screws provide a high
strength direct screw fixing.
INSTALLATION
TECHNOLOGY
When a “fastening solution” is not
enough, PSM is able to offer a Total
Assembly Solution. The choice ranges
from a relatively simple standard
machine through CNC workstations to
complete turnkey solutions
incorporating state of the
art technology.
PSM offer a wide range of pre-applied
processes for the locking and sealing of
threaded components. These include
the Tuf-Lok ® Blue Nylon anti-vibration
patch, a large range of
Micro-encapsulated Adhesives and
Non-curing Sealants supplied by
Omni-Technik, Loctite, and 3M and also
the Nyltite Nylon Collar for the
under head sealing of thread
forming/cutting screws.
Please contact your local PSM Sales Office for more information on these products . . .

AUSTRALIA
P.S.M FASTENERS (PTY) LIMITED
159-163 Victoria Road, P.O. Box 1079, St. Peter,
New South Wales 2204, AUSTRALIA
Tel: (61) 2 95607244 Fax: (61) 2 95698441
HOLLAND
M. SEHER & CO BV
Postbus 190, 2900 AD Capelle a/d IJssel, HOLLAND
Tel: (31) 10 2580888 Fax: (31) 10 2580899
SWEDEN
P.S.M FASTENERS AB
P.O. Box 2203, S-169 02 Solna, SWEDEN
Tel: (46) 828 2815 Fax: (46) 829 1414
AUSTRIA
AVDEL VERBINDUNGSELEMENTE GMBH
Industriestraße B 13/2,
A-2345 Brunn/Gebirge, AUSTRIA
Tel: (43) 2236 33273 Fax: (43) 2236 33274
BELGIUM
M. SEHER & CO NV
Assesteenweg 117/2, 1740 Ternat, BELGIUM
Tel: (32) 2521 0600 Fax: (32) 2521 8892
CHINA
P.S.M FASTENERS (WUXI) CO. LTD.
Wuxi - Singapore Industrial Park,
No. 226 A & 225C, Xing Chuang, Road 4
Jiang Su, P R CHINA
Tel: (86) 510 528 2901 Fax: (86) 510 528 2903
P.S.M FASTENERS (TIANJIN)
Room 706, DD Centre, 26 Jie Da Road,
TEDA, Tianjin, P R CHINA
Tel: (86) 22 652 98470 Fax: (86) 22 652 98550
DENMARK
SCANFAST APS
Kogevej 206, DK-4000 Roskilde, DENMARK
Tel: (45) 70 27 00 72 Fax: (45) 70 27 27 32
EIRE
APPIAN FASTENER SYSTEMS LTD
Unit 7, Hibernian Industrial Estate,
Greenhills Road, Tallaght, Dublin 24, EIRE
Tel: (353) 1452 4266 Fax: (353) 1452 4047
FRANCE
P.S.M FIXATION S.A.
Z. I. La Beurrière BP39, 49241 Avrille Cedex, FRANCE
Tel: (33) 02 41 21 25 00 Fax: (33) 02 41 21 25 25
HONG KONG
P.S.M FASTENERS (HONG KONG) PTE LTD.
Unit 1908, Westley Square,
48 Hoi Yuen Road, Kwun Tong,
Kowloon, HONG KONG
Tel: (852) 2652 5051 Fax: (852) 2652 5056
ITALY
P.S.M CELADA FASTENERS S.R.L.
Via Porpora 24, 20131 Milano, ITALY
Tel: (39) 02 29400630 Fax: (39) 02 29514888
JAPAN
JAPAN P.S.M CO. LTD.
8 Denenchofu Minami, OHTA, Tokyo 145 JAPAN
Tel: (81) 3 3756 7227 Fax: (81) 3 3750 2200
NEW ZEALAND
HYLTON PARK FASTENERS
117 Wrights Road, Addington, P.O. Box 8191
Christchurch, NEW ZEALAND
Tel: (64) 3 338 8825 Fax: (64) 3 338 8938
NORWAY
TORP FASTENERS
Borggaten 1, P.O. Box 2953, Toyen 0608, Oslo,
NORWAY
Tel: (47) 22 681530 Fax: (47) 22 199127
SINGAPORE
P.S.M FASTENER (SINGAPORE) PTE LTD.
100E Pasir Panjang Road,
#04-05 Century Warehouse, SINGAPORE 118521
Tel: (65) 2788 141 Fax: (65) 2788 142
SWITZERLAND
BOSSARD SCHRAUBEN AG
Steinhauserstrasse 70,
CH 6300 ZUG, SWITZERLAND
Tel: (41) 41 749 6331 Fax: (41) 41 749 6011
TAIWAN
P.S.M FASTENERS (TAIWAN) LTD.
No. 21 Alley 20 Lane 365, Fu-Te First Road,
Shih-Chih, Taipei, TAIWAN R.O.C.
Tel: (886) 2 694 6229 Fax: (886) 2 694 4976
UNITED KINGDOM
P.S.M INTERNATIONAL
Longacres, Willenhall,
West Midlands WV13 2JS, ENGLAND
Tel: (44) 1902 600000 Fax: (44) 1902 600073
P.S.M INTERNATIONAL SCOTLAND
Unit 4, Alpha Centre, Rothsay Dock,
Clydebank, Strathclyde, G81 1YP SCOTLAND
Tel: (44) 141 951 1626 Fax: (44) 141 951 1627
APPIAN FASTENERS LTD
No. 40 The Cutts, Derriaghy, Dunmurry,
Belfast BT17 9HS, N. IRELAND
Tel: (44) 1232 301972/301979 Fax: (44) 1232 622794
CANNING BRETT
Pontardawe Industrial Estate, Pontardawe,
Swansea, Glamorgan SA8 4EP, WALES
Tel: (44) 1792 863972 Fax: (44) 1792 830168
Automated Assembly Equipment
P.S.M MULTI AUTOMATION
72 Arthur Street, Lakeside, Redditch,
Worcestershire B98 8JY, ENGLAND
Tel: (44) 1527 516342 Fax: (44) 1527 516343
GERMANY
P.S.M METALL-UND KUNSTSTOFF
-VERBINDUNGSSYSTEME GMBH
Maarweg 233, 50825 Köln, GERMANY
Tel: (49) 221 4911063 Fax: (49) 221 4973359
SPAIN
FIJACIONES INDUSTRIALES P.S.M S.A.
Paseo Ferrocarriles Catalanes, 138,
08940 Cornella, Barcelona, SPAIN
Tel: (34) 93 474 07 07 Fax: (34) 93 474 11 97
U.S.A.
P.S.M FASTENER CORPORATION
12223 C.R. Koon Highway, Newberry,
South Carolina 29108, U.S.A.
Tel: (1) 803 321 1300 Fax: (1) 803 364 7377
P.S.M INTERNATIONAL
© P.S.M International 2003
INTERNATIONAL